SILENT AND THIN RF BODY COIL
First Claim
1. A magnetic resonance imaging apparatus comprising:
- an examination region in which an imaging subject is disposed for examination;
a cover around the examination region;
magnetic field gradient coils that impose selected magnetic field gradients on a main magnetic field within the examination region;
a radio frequency (RF) coil for generating radio frequency excitation pulses in the examination region, the radio frequency coil including a plurality of coil elements disposed on the cover distally from the examination region; and
a radio frequency (RF) screen associated with the coil elements, which radio frequency screen shields the coil elements and is disposed about the gradient coils such that the coil elements are mechanically decoupled from the RF screen and substantially acoustically isolated from the RF screen and gradient coils.
1 Assignment
0 Petitions
Accused Products
Abstract
An imaging subject (16) is disposed in an examination region (12) for examination. A cover (18) is disposed around the examination region (12). Magnetic field gradient coils (30) impose selected magnetic field gradients on a main magnetic field (B0) within the examination region (12). A radio frequency (RF) coil (36) generates radio frequency excitation pulses in the examination region (12), the radio frequency coil (36) including a plurality of coil elements (381, 382, 383) disposed on the cover (18) distally from the examination region (12). A radio frequency (RF) screen (40) associated with the coil elements (381, 382, 383) shields the coil elements (381, 382, 383) and is disposed about the gradient coils (30) such that the coil elements (381, 382, 383) are mechanically decoupled from the RF screen (40) and substantially acoustically isolated from the RF screen (40) and gradient coils (30).
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Citations
20 Claims
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1. A magnetic resonance imaging apparatus comprising:
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an examination region in which an imaging subject is disposed for examination; a cover around the examination region; magnetic field gradient coils that impose selected magnetic field gradients on a main magnetic field within the examination region; a radio frequency (RF) coil for generating radio frequency excitation pulses in the examination region, the radio frequency coil including a plurality of coil elements disposed on the cover distally from the examination region; and a radio frequency (RF) screen associated with the coil elements, which radio frequency screen shields the coil elements and is disposed about the gradient coils such that the coil elements are mechanically decoupled from the RF screen and substantially acoustically isolated from the RF screen and gradient coils. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A magnetic resonance method comprising:
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mechanically coupling individual coil segments adjacently one another on a bore cover distally from an examination region and proximately to gradient coils; shielding the coil segments with a radio frequency (RF) screen which is mechanically decoupled from the coil segments and mechanically coupled to the gradient coils; and covering a scanner bore with the bore cover and the coupled coil segments. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A magnetic resonance apparatus comprising:
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a main magnetic, which generates a main field through an examination region; magnetic field gradient coils that impose selected magnetic field gradients on the main magnetic field within the examination region; an RF coil; a radio frequency (RF) screen associated with the RF coil, which radio frequency screen shields the RF coil, and is disposed about the gradient coils such that the RF coil is mechanically decoupled from the RF screen and substantially acoustically isolated from the RF screen and the gradient coils; and a compensating processor, which compensates for at least induced changes in RF fields due to at least one of (a) a mechanical interference between the RF screen and the RF coil attributable to the gradient coils vibrations or (b) a patient interaction with the RF coil.
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Specification